Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb75aa1427b8dfe4…

MALICIOUS

PDF

72.2 KB Created: 2020-11-18 02:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8376e3a17a68f4c75d49c236fe6907a7 SHA-1: 90041e49d33c33021d73cba84a4e03b8480b1715 SHA-256: cb75aa1427b8dfe48501b6bbe84d9fabd4e7c634fc9e127d6f09542e869b2ce4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/strik?utm_term=create+a+new+dataframe+pandas PDF link annotation
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/fe0a348b8f.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://terifurarogo.weebly.com/uploads/1/3/4/3/134317228/jibiribatobuger.pdfIn PDF document text
    • https://minibimegoviw.weebly.com/uploads/1/3/4/3/134333268/6748876.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/203980.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/bimibeginowiromed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495550/normal_5fb45cf40c56b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2a8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5fab2ab06f741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jagux/technology_of_the_gods_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/free_text_app_with_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/my_boy_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/95202733284.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 5152 bytes
SHA-256: b929bf883ae02d98b705281372389fcd1c82ee85ed43b33d6c83a87de28b7ab1
font_01_sfnt_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 11756 bytes
SHA-256: a9be5034c337e16ef75608bfa46c51b8aee687f3797dc95b60651a64abde7e3a